* Fix flatten utils to handle Discrete.start
* Fix vector space utils to handle Discrete.start
* More granular dispatch in vector utils
* Fix Box including the high end of the interval
* Fixed ordering of space. Added singledispatch utility.
* Added singledispatch utility to vector.utils & changed order of space argument
* Fixed Error from _BaseGymSpaces
* Minor adjustment for Discrete Spaces
* Fixed Tests/ to reflect changes
* Fixed precommit error - custom namespaces
* Concrete Implementations start with _
* Move tests to root with automatic PyCharm import refactoring. This will likely fail some tests
* Changed entry point for a registration test env.
* Move a stray lunar_lander test to tests/envs/...
* black
* Change the version from which importlib_metadata is replaced with importlib.metadata. Also requiring installing importlib_metadata for python 3.8 now.
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* Undo last commit
